CN1850914A - Method for producing high covering power titanium dioxide pigment - Google Patents
Method for producing high covering power titanium dioxide pigment Download PDFInfo
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- CN1850914A CN1850914A CN 200610020846 CN200610020846A CN1850914A CN 1850914 A CN1850914 A CN 1850914A CN 200610020846 CN200610020846 CN 200610020846 CN 200610020846 A CN200610020846 A CN 200610020846A CN 1850914 A CN1850914 A CN 1850914A
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Abstract
The invention supplies a manufacture method for strong covering power titanium dioxide pigment that includes the following steps: making slurry; adjusting the pH value of the slurry; adding dispersing agent and filtering; heating; adding sodium silicate solution; adding mixture of sodium silicate and sulphuric acid solution; adjusting the pH value to 7.0-8.0; filtering, washing, drying, taking gas smashing and organic process. The invention has strong covering power, good dispersibility and high weathering resistance.
Description
Technical field
The present invention relates to a kind of production method of pigment, particularly relate to a kind of production method of high covering power titanium dioxide pigment.
Background technology
Advantages such as specific refractory power height, reducing power are strong because of having for titanium dioxide, glossiness and whiteness are good become best white pigment, are widely used in fields such as coating, plastics, papermaking, printing ink and chemical fibre.Because the titanium dioxide photocatalytic activity of rutile titanium dioxide particularly, the organic composition that in use can catalyzed degradation contacts with it makes coating produce phenomenons such as loss of gloss and powder of detached, the various performances and the work-ing life of seriously reducing product.Therefore, adopt film-coating technique to TiO
2Particle carries out surface treatment, promptly at TiO
2Particle surface coats the good material of one deck photochemistry inertia and makes barrier, thereby reduces TiO
2Photochemical activity, help improving TiO
2Performances such as the weathering resistance of particle, dispersiveness, gloss and opacifying power.
Existing to TiO
2Particle carries out surface treatment to improve TiO
2The method of pigment performance adopts inorganic coating and organic coated usually.The chemical substance that can be used for inorganic coating is more, and the most frequently used is silicon, aluminium, zirconium, phosphorus, and this coating process is at TiO
2Coat the fine and close SiO of one deck on the particle earlier
2, ZrO
2Or CeO
2To improve its weathering resistance and gloss, coat one deck aluminum oxide again to improve performances such as its dispersiveness and opacifying power, also have in the centre or innermost layer coating P
2O
5, as English Patent 1368601, PCT application WO01/79357A2 etc.United States Patent (USP) 3897261 provides improvement TiO
2The method of pigment opacifying power is that 60 ℃, PH are under 7 the condition, at TiO in temperature promptly
2Twice deposition of silica and aluminum oxide on the particle, this method increase though product hides performance, but weathering resistance is relatively poor owing to do not coat fine and close silicon.United States Patent (USP) 4075031 also provides a kind of improvement TiO
2The method of pigment opacifying power is promptly carried out coating under 90 ℃ of high temperature, because temperature is higher, cause reaction wayward, and settling can not be deposited on TiO fully
2On the particle, influence TiO
2Performance.
Summary of the invention
The present invention is directed to the deficiency of existing method, a kind of production method of high covering power titanium dioxide pigment is provided, this method can be carried out coating at a lower temperature, and product has high opacifying power and good weather.
The technical scheme that technical solution problem of the present invention is adopted is: the production method of high covering power titanium dioxide pigment may further comprise the steps:
1) with distilled water or deionized water the titanium dioxide first product is mixed with slurry;
2) with alkaline solution size mixing the material pH value be alkalescence;
3) add dispersion agent, sand milling after-filtration in sand mill;
4) slurry after will filtering joins in the coating jar, is heated to 60 ℃～85 ℃;
5) add sodium silicate solution;
6) also stream adds sodium silicate solution and sulphuric acid soln, and making the slurry pH value is 10.0～11.0;
7) at the uniform velocity add sulphuric acid soln, making the slurry pH value is 7.0～8.0;
8) slurry temperature is reduced to 50 ℃～70 ℃, and stream adding sodium silicate solution and sulphuric acid soln, making the slurry pH value is 7.5～8.5, stirs slaking;
9) keeping slurry temperature is 50 ℃～70 ℃, and stream adding sodium aluminate solution and sulphuric acid soln, and making the slurry pH value is 7.5～8.5, stirs slaking;
10) be 7.0～8.0 with the sulphuric acid soln material pH value of sizing mixing, coating finishes after the restir slaking;
11) vacuum filtration, washing, drying is carried out comminution by gas stream and organic process.
Further, the described titanium dioxide first product of step 1 is the TiO 2 pigment with chlorination process or Production By Sulfuric Acid Process.
Further, described titanium dioxide first product is anatase titanium dioxide or rutile-type.
Further, the described alkaline solution of step 2 is sodium hydroxide solution, potassium hydroxide solution or sodium carbonate solution.
Further, the described pH value of step 2 is 10.0～10.5.
Further, the described dispersion agent of step 3 is sodium silicate solution or sodium hexametaphosphate solution.
Further, the add-on of the described sodium silicate solution of step 5 and step 6 all is 1.0%～2.5% of a titanium dioxide first product add-on, and the add-on of described sodium silicate solution is with SiO
2Meter.
Further, the add-on of described sodium silicate solution of step 8 and the described sodium aluminate solution of step 9 all is 5.0%～8.0% of a titanium dioxide first product add-on, and the add-on of described sodium silicate solution is with SiO
2Meter, the add-on of described sodium aluminate solution is with Al
2O
3Meter.
Further, the described organic process of step 11 adopts amine, alcohols, organosilicon or carboxylic-acid to handle.
Further, the weight percent concentration of described sulphuric acid soln is 10%～50%.
The invention has the beneficial effects as follows: by adjusting the pH value and the temperature of titania slurry, successively at TiO
2Particle surface coats the permanent seal cooling compact silicon dioxide be not less than 2.5% and the good loose porous silicon-dioxide of hydrophilic opacifying power that is not less than 4.0%, coats the aluminum oxide that is not less than 4.0% good dispersity again.The TiO 2 pigment that the present invention produces has the high characteristics of opacifying power height, good dispersity and weathering resistance, because the particle surface rough porous is suitable for building coating, is suitable for the high matt latex paint of pigment volume concentration (PVC) especially.
Embodiment
Below in conjunction with embodiment the present invention is further described.
Embodiment 1:
500g is mixed with slurry with deionized water with the titanium dioxide first product, and it is 10.05 that the adding sodium hydroxide solution makes the slurry pH value, adds sodium hexametaphosphate solution, with slurry sand milling in sand mill, goes out sand grains and coarse particles with sieving.Slurry is joined in the coating jar, be warming up to 76 ℃, begin to wrap fine and close silicon.0.5% of adding titanium dioxide first product add-on sodium silicate solution is (with SiO earlier
2Meter), then and stream add 0.5% sodium silicate solution of titanium dioxide first product add-on (with SiO
2Meter) and weight percent concentration be 20% sulphuric acid soln, the speed of adding maintains between 10.0～11.0 with maintenance slurry pH value.Behind reinforced the end, at the uniform velocity being acidified to slurry PH with sulphuric acid soln is 7.0, the restir slaking, and temperature is reduced to 70 ℃ by 76 ℃, begins to wrap porous silicon.And stream adds 5.0% sodium silicate solution of titanium dioxide first product add-on (with SiO
2Meter) and weight percent concentration be 40% sulphuric acid soln, keeping the slurry pH value is 8.0 ± 0.5, the stirring slaking.Then and stream to add 5.0% sodium aluminate solution of titanium dioxide first product add-on and weight percent concentration be 40% sulphuric acid soln, adding speed is 8.0 ± 0.5 to keep the slurry pH value, the restir slaking, with the sulfuric acid material pH value of sizing mixing is 7.5, stirs slaking, filters, washing, drying, comminution by gas stream adds the organic agent TriMethylolPropane(TMP) and carries out organic process when comminution by gas stream then.
The weight percent of the pigment of preparation consists of: TiO
2: SiO 81.90%,
2: Al 9.76%,
2O
3: 4.83%, the solubility in acid of pigment is less than 0.01%, and oil number is 34.3g/100g, and in containing 25% titanium dioxide pigment coating, opacifying power is 100g/m
2
Embodiment 2:
500g is mixed with slurry with deionized water with the titanium dioxide first product, and it is 10.2 that the adding potassium hydroxide solution makes the slurry pH value, adds sodium silicate solution, with slurry sand milling in sand mill, goes out sand grains and coarse particles with sieving.Slurry is joined in the coating jar, be warming up to 60 ℃, begin to wrap fine and close silicon.1.0% of adding titanium dioxide first product add-on sodium silicate solution is (with SiO earlier
2Meter), then and stream add 1.0% sodium silicate solution of titanium dioxide first product add-on (with SiO
2Meter) and weight percent concentration be 20% sulphuric acid soln, the speed of adding maintains between 10.0～11.0 with maintenance slurry pH value.Behind reinforced the end, at the uniform velocity being acidified to slurry PH with sulphuric acid soln is 7.5, the restir slaking, and keeping temperature is 60 ℃, begins to wrap porous silicon.And stream adds 6.0% sodium silicate solution of titanium dioxide first product add-on (with SiO
2Meter) and weight percent concentration be 30% sulphuric acid soln, keeping the slurry pH value is 7.8 ± 0.3, the stirring slaking.Then and stream to add 7.0% sodium aluminate solution of titanium dioxide first product add-on and weight percent concentration be 40% sulphuric acid soln, adding speed is 7.8 ± 0.3 to keep the slurry pH value, the restir slaking, with the sulfuric acid material pH value of sizing mixing is 7.0, stirs slaking, filters, washing, drying, comminution by gas stream adds the organic agent trolamine and carries out organic process when comminution by gas stream then.
The weight percent of the pigment of preparation consists of: TiO
2: SiO 80.24%,
2: Al 8.33%,
2O
3: 6.46%, the solubility in acid of pigment is 0.108%, oil number is 26.2g/100g TiO
2, dispersiveness is 15 μ m, in 25% titanium dioxide pigment coating, opacifying power is 95g/m
2
Embodiment 3:
500g is mixed with slurry with distilled water with the titanium dioxide first product, and it is 10.5 that the adding sodium carbonate solution makes the slurry pH value, adds sodium silicate solution, with slurry sand milling in sand mill, goes out sand grains and coarse particles with sieving.Slurry is joined in the coating jar, be warming up to 85 ℃, begin to wrap fine and close silicon.1.0% of adding titanium dioxide first product add-on sodium silicate solution is (with SiO earlier
2Meter), then and stream add 1.5% sodium silicate solution of titanium dioxide first product add-on (with SiO
2Meter) and weight percent concentration be 10% sulphuric acid soln, the speed of adding maintains between 10.0～11.0 with maintenance slurry pH value.Behind reinforced the end, at the uniform velocity being acidified to slurry PH with sulphuric acid soln is 8.0, the restir slaking, and cooling is 50 ℃, begins to wrap porous silicon.And stream adds 8.0% sodium silicate solution of titanium dioxide first product add-on (with SiO
2Meter) and weight percent concentration be 40% sulphuric acid soln, keeping the slurry pH value is 8.2 ± 0.3, the stirring slaking.Then and stream to add 8.0% sodium aluminate solution of titanium dioxide first product add-on and weight percent concentration be 50% sulphuric acid soln, adding speed is 8.2 ± 0.3 to keep the slurry pH value, the restir slaking, with the sulfuric acid material pH value of sizing mixing is 8.0, stirs slaking, filters, washing, drying, comminution by gas stream then adds the organic agent lauric acid when comminution by gas stream or organosilicon carries out organic process.
The weight percent of the pigment of preparation consists of: TiO
2: SiO 80.92%,
2: Al 8.04%,
2O
3: 6.25%, the solubility in acid of pigment is 0.288%, and oil number is 26.1g/100g, and dispersiveness is 23 μ m, and in 25% titanium dioxide pigment coating, opacifying power is 95g/m
2
Claims (10)
1, the production method of high covering power titanium dioxide pigment may further comprise the steps:
1) with distilled water or deionized water the titanium dioxide first product is mixed with slurry;
2) with alkaline solution size mixing the material pH value be alkalescence;
3) add dispersion agent, sand milling after-filtration in sand mill;
4) slurry after will filtering joins in the coating jar, is heated to 60 ℃～85 ℃;
5) add sodium silicate solution;
6) also stream adds sodium silicate solution and sulphuric acid soln, and making the slurry pH value is 10.0～11.0;
7) at the uniform velocity add sulphuric acid soln, making the slurry pH value is 7.0～8.0;
8) slurry temperature is reduced to 50 ℃～70 ℃, and stream adding sodium silicate solution and sulphuric acid soln, making the slurry pH value is 7.5～8.5, stirs slaking;
9) keeping slurry temperature is 50 ℃～70 ℃, and stream adding sodium aluminate solution and sulphuric acid soln, and making the slurry pH value is 7.5～8.5, stirs slaking;
10) be 7.0～8.0 with the sulphuric acid soln material pH value of sizing mixing, coating finishes after the restir slaking;
11) vacuum filtration, washing, drying is carried out comminution by gas stream and organic process.
2, the production method of high weathering resistance titanium dioxide pigment as claimed in claim 1 is characterized in that: the described titanium dioxide first product of step 1 is the TiO 2 pigment with chlorination process or Production By Sulfuric Acid Process.
3, the production method of high weathering resistance titanium dioxide pigment as claimed in claim 2 is characterized in that: described titanium dioxide first product is anatase titanium dioxide or rutile-type.
4, the production method of high weathering resistance titanium dioxide pigment as claimed in claim 1 is characterized in that: the described alkaline solution of step 2 is sodium hydroxide solution, potassium hydroxide solution or sodium carbonate solution.
5, the production method of high weathering resistance titanium dioxide pigment as claimed in claim 1 is characterized in that: the described pH value of step 2 is 10.0～10.5.
6, the production method of high weathering resistance titanium dioxide pigment as claimed in claim 1 is characterized in that: the described dispersion agent of step 3 is sodium silicate solution or sodium hexametaphosphate solution.
7, the production method of high weathering resistance titanium dioxide pigment as claimed in claim 1, it is characterized in that: the add-on of the described sodium silicate solution of step 5 and step 6 all is 1.0%～2.5% of a titanium dioxide first product add-on, and the add-on of described sodium silicate solution is with SiO
2Meter.
8, the production method of high weathering resistance titanium dioxide pigment as claimed in claim 1, it is characterized in that: the add-on of described sodium silicate solution of step 8 and the described sodium aluminate solution of step 9 all is 5.0%～8.0% of a titanium dioxide first product add-on, and the add-on of described sodium silicate solution is with SiO
2Meter, the add-on of described sodium aluminate solution is with Al
2O
3Meter.
9, the production method of high weathering resistance titanium dioxide pigment as claimed in claim 1 is characterized in that: the described organic process of step 11 adopts amine, alcohols, organosilicon or carboxylic-acid to handle.
10, the production method of high weathering resistance titanium dioxide pigment as claimed in claim 1 is characterized in that: the weight percent concentration of described sulphuric acid soln is 10%～50%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100208467A CN100506922C (en) | 2006-05-18 | 2006-05-18 | Method for producing high covering power titanium dioxide pigment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100208467A CN100506922C (en) | 2006-05-18 | 2006-05-18 | Method for producing high covering power titanium dioxide pigment |
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|---|---|
| CN1850914A true CN1850914A (en) | 2006-10-25 |
| CN100506922C CN100506922C (en) | 2009-07-01 |
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| CNB2006100208467A Expired - Fee Related CN100506922C (en) | 2006-05-18 | 2006-05-18 | Method for producing high covering power titanium dioxide pigment |
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| CN100439454C (en) * | 2006-12-20 | 2008-12-03 | 中国科学院山西煤炭化学研究所 | Titanium dioxide surface organic-inorganic modification method |
| CN101851435A (en) * | 2010-05-26 | 2010-10-06 | 宁波新福钛白粉有限公司 | Method for producing high-brightness blue-phase rutile type titanium dioxide |
| CN102391689A (en) * | 2011-08-11 | 2012-03-28 | 四川龙蟒钛业股份有限公司 | Preparation method of high dispersing rutile product |
| CN101565566B (en) * | 2009-06-10 | 2013-03-06 | 上海华力索菲科技有限公司 | Method for treating and processing the compound surface of high-quality delustrant |
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| CA1304995C (en) * | 1988-04-15 | 1992-07-14 | John R. Brand | Process for producing durable titanium dioxide pigments |
| CN1067967C (en) * | 1998-09-11 | 2001-07-04 | 清华大学 | Superfine titanium white surface cladding tech. and reactor thereof |
| AU2001255328B2 (en) * | 2000-04-12 | 2005-10-20 | Cristal Usa Inc. | Methods for producing titanium dioxide having improved gloss at low temperatures |
| CN1328962A (en) * | 2000-06-15 | 2002-01-02 | 泰兴纳米材料厂 | Method for preparing nanometer titanium dioxide micropowder |
| US6783586B2 (en) * | 2001-11-01 | 2004-08-31 | E. I. Du Pont De Nemours And Company | Easy to disperse, high durability TiO2 pigment and method of making same |
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| CN100439454C (en) * | 2006-12-20 | 2008-12-03 | 中国科学院山西煤炭化学研究所 | Titanium dioxide surface organic-inorganic modification method |
| CN101565566B (en) * | 2009-06-10 | 2013-03-06 | 上海华力索菲科技有限公司 | Method for treating and processing the compound surface of high-quality delustrant |
| CN101851435A (en) * | 2010-05-26 | 2010-10-06 | 宁波新福钛白粉有限公司 | Method for producing high-brightness blue-phase rutile type titanium dioxide |
| CN101851435B (en) * | 2010-05-26 | 2013-05-22 | 宁波新福钛白粉有限公司 | Method for producing high-brightness blue-phase rutile type titanium dioxide |
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| CN103436054B (en) * | 2013-08-29 | 2015-07-01 | 攀钢集团攀枝花钢铁研究院有限公司 | Low viscosity enveloping method of titanium dioxide |
| CN103436054A (en) * | 2013-08-29 | 2013-12-11 | 攀钢集团攀枝花钢铁研究院有限公司 | Low viscosity enveloping method of titanium dioxide |
| CN107308928A (en) * | 2017-07-17 | 2017-11-03 | 中钛化工集团有限公司 | The special titanium dioxide process of emulsion paint |
| CN108997788A (en) * | 2018-08-27 | 2018-12-14 | 攀钢集团重庆钛业有限公司 | The preparation method of high covering power titanium dioxide |
| CN109651848A (en) * | 2019-01-29 | 2019-04-19 | 河南佰利联新材料有限公司 | A kind of preparation method of inner-printing ink special titanium pigment |
| CN109651848B (en) * | 2019-01-29 | 2020-09-25 | 河南佰利联新材料有限公司 | Preparation method of special titanium dioxide for inner printing ink |
| CN112940541A (en) * | 2020-11-25 | 2021-06-11 | 正太新材料科技有限责任公司 | Preparation method of titanium dioxide nano visible light catalytic pigment |
| CN114621607A (en) * | 2020-12-11 | 2022-06-14 | 中信钛业股份有限公司 | Preparation method of special titanium dioxide pigment for high-temperature-resistant general engineering plastics |
| CN114621607B (en) * | 2020-12-11 | 2023-06-06 | 中信钛业股份有限公司 | Preparation method of high-temperature-resistant special titanium dioxide pigment for general engineering plastics |
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Assignee: Chongqing Titanium Industry Co., Ltd. of Pangang Group Assignor: Panzhihua Iron & Steel Research Institute of PanGang Group Contract fulfillment period: 2009.3.11 to 2014.3.10 contract change Contract record no.: 2009500000026 Denomination of invention: Method for producing high covering power titanium dioxide pigment Granted publication date: 20090701 License type: Exclusive license Record date: 2009.9.27 |
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Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2009.3.11 TO 2014.3.10; CHANGE OF CONTRACT Name of requester: PANGANG GROUP CHONGQING TITANIUM CO., LTD. Effective date: 20090927 |
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Assignee: Chongqing Titanium Industry Co., Ltd. of Pangang Group Assignor: Panzhihua Iron & Steel Research Institute of PanGang Group Contract fulfillment period: 2009.3.11 to 2014.3.10 contract change Contract record no.: 2009500000026 Denomination of invention: Method for producing high covering power titanium dioxide pigment Granted publication date: 20090701 License type: Exclusive license Record date: 2009.9.27 |
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